1. Reliability

2. Probability a product will perform as promoted for a given time period under given conditions
Functional Failure: does not operate as designed
Reliability Failure: does not operate as designed as long as it is supposed to
Maintainability: related to durability and refers to once a product breaks, what is the probability it can become functional again

3. Inherent Reliability is Designed Reliability
Found by reliability testing

4. Achieved Reliability is Empirical

5. Infant Mortality Period: if it makes it by time x, then the constant failure rate takes over

6. Failure Rate, lambda, is units per hour
lambda = number of failures/total unit operating hours

7. Mean Time to Failure MTTF (non repairable) or Mean Time Between Failure MTBF (repairable items) is theta = 1/lambda

8. For a given p of failure, what is the p of failure in a given time interval p = e ^ (-lambda (t2-t1))
number happening in given time that is Poisson distributed which means the interval between is exponentially distributed

9. Reliability Function R of given time (RT = e^(-lambda * T)

10. Reliability of process with Tasks in Serial
R1 times R2… times RN

11. Reliability of process with steps in parallel
1-(1-R1)(1-R2)(1-Rn)

12. Redundancy and Apollo 13